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[1]LI Shengli,GONG Zaiwu,SHI Zhenbin.Characteristics of Change in Extreme Precipitation Indices in Shandong Province in Recent 50 Years[J].Research of Soil and Water Conservation,2016,23(04):120-127.

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Characteristics of Change in Extreme Precipitation Indices in Shandong Province in Recent 50 Years

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 04 Page number: 120-127 Column: Public date: 2016-04-28

Title:: Characteristics of Change in Extreme Precipitation Indices in Shandong Province in Recent 50 Years

Author(s):: LI Shengli^1,2, GONG Zaiwu¹, SHI Zhenbin³; 1. School of Public Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China;
2. Ji’nan Meteorological Bureau, Ji’nan 250102, China;
3. Shandong Meteorological Bureau, Ji’nan 250031, China

Keywords:: climate change; extreme precipitation; Shandong Province

CLC:: P333.1

DOI:: -

Abstract:: Based on daily precipitation data recorded in 117 meteorological stations in Shandong Province during the period from 1961 to 2013, the temporal variability and spatial distributions of extreme precipitations were studied by using nine extreme precipitation indices. At the same time, the possible connections between extreme precipitation indices and annual total precipitation were analyzed. The main conclusions are as the followings. In the past 53 years (long period), an decreasing trend was observed in terms of the indices such as annual total precipitation extremes(R₉₅P_TOT), annual count of days with RR≥10 mm(R₁₀), RR≥20 mm(R₂₀), and RR≥50 mm(R₅₀), maximum number of consecutive wet days(CWD), while an non-significantly enhanced trend was observed in terms of the indices such as the maximum 1-day precipitation amount(RX_1d), the maximum 5-day precipitation amount(RX_5d), maximum number of consecutive dry days(CDD)and the simply daily intensity index(SDⅡ). In the past 23 years (short period), an increasing trend was observed in terms of the indices except RX_1d, CDD. Each extreme precipitation index trend between long period and short period was not same in different regions. Amplitude in short period was greater and stations with significantly trend were more than long period. The correlation coefficients between most extreme precipitation indices and annual total precipitation were positive or even significant positive except one third of stations between CDD and annual total precipitation which had no significant negative correlations.

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